As a follow-up to the thread about rtc support for some loongson 2e/2f
boards, this patch tries to address the "REVISIT"/"FIXME" comments about
rtc binary mode handling and allow rtc to work with rtc in binary mode.
I've also raised the message about 24-h mode not supported to warning
otherwise, one may end up with no rtc without any message in the kernel
log.
Signed-off-by: Arnaud Patard <apatard@mandriva.com>